My hunch it is some investment speculators that think that line can be built as easily as a new port could be:
08 DEC 2011: ANALYSIS
As Coal Use Declines in U.S.,
Coal Companies Focus on China
“The Powder River Basin has sufficient coal to help light Chinese cities for years to come. The problem is getting it there. Existing ports in the northwestern United States cannot handle exporting such large quantities of coal, prompting the coal industry to propose building two new ports. Peabody has partnered with SSA Marine in hopes of building a new terminal near Bellingham, Wash. Arch Coal is working with an Australian company, Millennium Bulk Terminals, on a proposal to turn an old Reynolds Metal site into a coal terminal on the Columbia River at Longview, Wash., just downstream from Portland, Ore. The Longview proposal was put on hold this spring after leaked internal documents showed that the proponents planned on building a bigger terminal than they had applied for, but they say they will re-apply.”
http://e360.yale.edu/feature/as_coal_use_declines_in_us_coal_companies_focus_on_china/2474/